Let's take a break from politics on this Mercedes Board with some Appliance talk. It's all somehow related!

We have a Kitchenaid slide-in electric cook-top / oven.
Every once in a while, the electronic screen will show either "F2" or "F3", accompanied with beeping from the warning beeper. This only happens with the oven. When this happens, the oven seems to heat slowly.
I have pulled the thing apart and tightened all the connections. Nothing appears to be faulty.

Anybody have a clue what prompts the F2 or F3 warning?

It is a Kitchenaid Model KEDT105VMH, Serial number XX3901853.

And if I need parts, anybody here sell them? Cheap of course - I have to pay for all these cars somehow.

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Thank You!
Fred
2009 ML350
2004 SL600
2004 SL500
1996 SL600
2002 SLK32
2005 CLK320 cabrio
2003 ML350
1997 C280 Sport